Improvement in clamps for anchoring-cores



UNITED STATES LEWIS E. ROBERTS, OF Q UAKERTOWN, PENNSYLVANIA.

PATENT OFFICE.

IMPROVEMENT IN CLAMPS FOR ANCHORINC--CORES.

Specification forming part of Letters Patent No. 160,062, dated February 23, 1875 application led January 20, 1875.

To all 'whom tmay concern:

Be it known that I, LEwIs E. ROBERTS, of Quakertown, in the county of Bucks and State of Pennsylvania, have invented a Clamp for Anchoring-Cores in Foundry-Flasks, ot which the following is a specication:

The object of my invention is to dispense with the use of weights heretofore placed upon the asks and anchor-bars to keep the cores steadily in their proper positions during the operation of casting iron and other metals; and my invention consists of a slotted bar of iron, or any other suitable metal, provided with an adjustable screw and screw nuts in the slot, and spurs and a pointed screwing bar in the two respective ends, whereby the said slotted bar can be readily clamped across the top ofthe lilled liask, and the nutted screw in the slot of the bar adjusted and operated so as to bear directly down upon the usual anchor-bar, and thus keep the core at that part from rising or becoming displaced during the operation of casting, as will be more fully and clearly described with reference :to the accompanying drawing, in which- Figure 1 is a perspective view of my said invention applied to a ask, the latter being indicated by dotted lines. Fig. 2 is a vertical longitudinal central section ofthe clamp, shown in Fig. 1.

rlhe body A B of the clamp is a bar of iron having two downward-projecting ends and a slot, a', along in the part which is between the two ends, substantially as represented in the drawing. At the inner side, near the lower end of one otl the downward projections of the bar AB, two spurs or pointed teeth, b', are rigidly secured, and at the opposite end of said bar a pointed screw-rod, b, is secured,

.so as to be rotated b'y hand in the operation of applying the clamp to a ask, as will hereinafter be explained. Secured in the slot a there is another screw-rod, a which is provided with two screw-nuts, 3 and 4, one of which is above the barA B, and the other one below it, and the said screw-rod can be readily moved and subsequently fixed so as to be rotated by hand. The lower end of the screw-rod a is slightly concave.

My said clamp is intended to be applied and operated as follows, viz: The core being inserted and supported in the usual wellknown manner in the drag 7 of the flask, and the coping applied and secured upon the drag with the usual adjustable anchor-rods projecting up through the coping, the clamp is then applied across the tlask, and made fast by means of the pointed spurs b b and the pointed screw-rod b with the slot a directly over the anchor-bar, which is to be operated upon. The nutted screw-bar c is then adjusted and secured by the screw-nuts 3 and 4, so that its con cave lower end will be directlyY over the projecting end of the anchorbar, and the said screw-bar a then screwed down upon the anchor-bar until the latter is pushed down into its intended bearing upon the core in the flask, as represented in connection with the dotted lines, showing the exterior ot' the flask and the projecting portions of the anchor-rods o t, each anchor-rod requiring a clamp.

It will be readily understood without any further explanation that my said adjustable clamps, applied and operated as described, will ai'ord great facility to the molder in adjustin g the pressure required upon the anchorrods, and in accurately keeping them in their intended positions during the operation of casting.

It is intended to have the clamps made in sufficient number and of various sizes to suit the requirements of the foundry. They are simple and inexpensive of construction, and will entirely do away with the use ot' the heavy weights of pig-iron heretofore used for the same purpose.

I claim as my invention- The adjustable clamp consisting of the slotted bar A B, with its spurs b', and screwingbar b, in combination with the anchor-adjusting screw a and nuts 3 and 4, the said parts being constructed and arranged substantially as and for the purpose set forth.

LEWIS E. ROBERTS.

Witnesses:

Tnos. MoRRIs, ROBERT MoRRIs. 

